Ceramics International最新文献

{"title":"Influence of ZrO2 and SiC on physico-mechanical, microstructure and electrical properties of cordierite ceramics based on utilizing talc/oil shale waste","authors":"H.K. Abd El-Hamid ,&nbsp;R.M. Khattab ,&nbsp;H.H. Abo-Almaged ,&nbsp;Mohammed.A. Taha ,&nbsp;S.E. Abo Sawan","doi":"10.1016/j.ceramint.2025.06.178","DOIUrl":"10.1016/j.ceramint.2025.06.178","url":null,"abstract":"<div><div><span>The present paper describes the in situ fabrication of fired cordierite-based ceramic matrix composites containing dispersed particles of ZrO</span>₂<span> or SiC.<span> Mixing Oil shale and talc with additions of monoclinic ZrO</span></span>₂<span><span><span> or SiC up to 15 wt% was performed and fired at 1200 °C. However, the initial mix composition of oil shale and talc was calculated stoichiometric to prepare cordierite ceramics, and the prepared mixtures were subjected to firing at 1150, 1200, and 1250 °C to optimize the cordierite formation. Phase compositions, microstructure, bulk density, apparent porosity, hardness, </span>fracture toughness, electric, and </span>dielectric properties were carefully investigated. The results showed that the optimum temperature for firing cordierite before the addition of SiC or ZrO</span>₂ is 1200 °C. The bulk density increased to 2.2 g/cm³ and apparent porosity decreased to about 9 % after the addition of 15 wt% of ZrO₂. The increase of SiC led to an increase in apparent porosity and a decrease in bulk density. The maximum bulk density reached 2 g/cm³<span> and the minimum apparent porosity dropped to 26 % after the addition of 10 wt% of SiC Vickers hardness and fracture toughness of the cordierite-ZrO</span>₂ or SiC samples increased with increasing percentage of ZrO₂ or SiC compared to pure cordierite samples. The maximum hardness value for ZrO₂<span>-containing samples is 7.8 GPa, while it reached 8.2 GPa for SiC-containing samples. Dielectric and electric properties are enhanced by the addition of ZrO</span>₂, which reversed is in the case of SiC addition. Thus this work succeeded in enhancing the mechanical and electrical properties of cordierite after the addition of ZrO or SiC for their ceramic filed applications.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 23","pages":"Pages 39445-39456"},"PeriodicalIF":5.6,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144922350","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Advancements in Janus two-dimensional materials: From basic theory to practical applications","authors":"Yi Luo ,&nbsp;Weiye He ,&nbsp;Kai Ren ,&nbsp;Chang Zhang ,&nbsp;Lijie Zuo ,&nbsp;Feng Shang ,&nbsp;Yunfei Ding ,&nbsp;Minglei Sun","doi":"10.1016/j.ceramint.2025.06.183","DOIUrl":"10.1016/j.ceramint.2025.06.183","url":null,"abstract":"<div><div>Janus two-dimensional materials including transition metal dichalcogenides<span><span><span>, transition metal carbides and </span>carbonitrides, and metal-organic frameworks, exhibit unique electronic, optical, piezoelectric, and </span>dielectric properties<span><span> due to their asymmetric atomic structures, making them promising candidates for nanoelectronics, energy storage conversion and<span> storage, and biomedical applications. This review comprehensively highlights the unique properties and typical applications of Janus two-dimensional materials and their van der Waals heterostructures. We explore the fundamental mechanisms underlying their electronic and </span></span>optoelectronic<span><span> properties, including band structures and light absorption. Strategies for enhancing their performance are discussed, providing a framework for addressing future research challenges. This comprehensive review integrates theoretical insights, synthesis techniques, and diverse applications, emphasizing the potential of Janus two-dimensional materials to revolutionize </span>hydrogen production<span> and other technological domains. We conclude by summarizing current advancements and future directions, offering inspiration for continued innovation in two-dimensional materials applications.</span></span></span></span></div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 23","pages":"Pages 39353-39372"},"PeriodicalIF":5.6,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144922417","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tailoring the optical and structural properties of spinel nickel ferrite by simultaneous Sr2+ and Ce3+ doping philosophy to enhance the photocatalytic efficiency","authors":"Reim Abdullah Almotiri ,&nbsp;Manal Mohammed Alkhmaisi ,&nbsp;Seung Goo Lee ,&nbsp;Muhammad Farooq Warsi","doi":"10.1016/j.ceramint.2025.06.259","DOIUrl":"10.1016/j.ceramint.2025.06.259","url":null,"abstract":"<div><div><span><span>Herein, Sr<span><span> and Ce co-doped spinel </span>nickel ferrites (SCNF) were synthesized using a simple </span></span>coprecipitation<span><span><span><span><span> technique. Annealing of prepared precipitates was carried out at high temperature in a controlled muffle furnace. Additionally, SCNF composites with carbon nanotubes (CNTs) were also prepared through ultrasonication. The prepared </span>photocatalyst samples were characterized by X-ray diffraction (XRD), </span>Fourier transform infrared spectroscopy, </span>photoluminescence, and X-ray photoelectron spectroscopy. XRD results confirmed the cubic spinel structure with the </span>Fd3m<span><span> space group of as-prepared spinel ferrites. Mott-Schottky analysis was carried out to determine the conduction band<span> (CB) and valence band<span> (VB) positions of the prepared doped and un-doped powder photocatalyst samples. The optical analysis results demonstrated a reduced band gap of 2.45 eV for the co-doped NF. Ciprofloxacin was used as a model drug to evaluate the </span></span></span>photodegradation performance of the as-prepared nickel ferrite-based semiconductor photocatalyst samples. Among the tested samples, the SCNF/CNTs composite showed the highest degradation efficiency, achieving 91.3 % degradation within 120 min with a rate constant of 0.02094 min</span></span></span>⁻¹<span>. The key influential factors on photodegradation<span><span> proficiency, such as the effect of drug concentration, photocatalyst dosage, pH effect, </span>radical scavengers, and reusability of photocatalyst, were also studied in detail and discussed in this article. It was observed that the optimal conditions for the photodegradation of ciprofloxacin using the SCNF/CNTs photocatalyst were 5 ppm concentration, 15 mg catalyst dose, and pH 7.</span></span></div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 23","pages":"Pages 40272-40288"},"PeriodicalIF":5.6,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144922722","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Improved mechanical and thermal properties of quasi-ductile metal-ceramic laminated composites produced from Ta foils and Ti3Al(Si)C2 filled preceramic paper","authors":"E.B. Kashkarov ,&nbsp;A.V. Abdulmenova ,&nbsp;D.G. Krotkevich ,&nbsp;M.S. Syrtanov ,&nbsp;K.K. Paushkina ,&nbsp;A. Nassyrbayev ,&nbsp;N. Travitzky","doi":"10.1016/j.ceramint.2025.06.270","DOIUrl":"10.1016/j.ceramint.2025.06.270","url":null,"abstract":"<div><div>This paper describes the fabrication and properties of novel laminated metal-ceramic composites obtained from highly filled preceramic papers based on Ti₃Al(Si)C₂<span><span><span> (TAC) MAX-phase and Ta metal foils. Composites with different architectures were formed by stacking of preceramic papers and metal foils, followed by spark plasma sintering at 1150 °C and 50 MPa for 5 min. The obtained laminated materials were characterized by homogeneous microstructure of individual layers, high </span>strength and quasi-ductile </span>fracture behavior<span>. A reaction layer of ∼7 μm in thickness consisting mainly of silicides<span><span><span> and intermetallics is revealed. </span>Thermal conductivity<span> and diffusivity<span> of laminated composites improved with increasing Ta/TAC ratio. Depending on the architecture, the </span></span></span>bending strength of composites ranged from 480 to 650 MPa. Fracture toughness of the composites increased from 8.1 to 11.4 MPa × m</span></span></span>^1/2 as the thickness ratio of Ta/TAC layers increased from 1/3 to 1/1. The toughening of the fabricated laminates is explained by the complex macroscale and microscale mechanisms discussed in the paper. The obtained results demonstrate that the superior mechanical properties and favorable thermal performance of the fabricated metal-ceramic composites make them promising candidates for advanced structural applications.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 23","pages":"Pages 40356-40366"},"PeriodicalIF":5.6,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144922729","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ultra-low εr and low dielectric loss (Mg1−xMnx)2Al4Si5O18 (x=0.1–0.5) microwave dielectric ceramics for patch antenna and dielectric resonator antenna applications","authors":"Ruihan Wang ,&nbsp;Dan Liu ,&nbsp;Kexin Xu ,&nbsp;Zipei Wang ,&nbsp;Haitao Wu ,&nbsp;Xu Zhou ,&nbsp;Huanrong Tian ,&nbsp;Lianwei Shan","doi":"10.1016/j.ceramint.2025.06.250","DOIUrl":"10.1016/j.ceramint.2025.06.250","url":null,"abstract":"<div><div>In this work, Mn²⁺<span> substitution was employed to modify cordierite-based microwave dielectric ceramics, formulated as (Mg</span>_1−xMn_x)₂Al₄Si₅O₁₈<span><span> (x = 0.1–0.5). XRD showed that when x ≤ 0.5, the phases are all low-temperature </span>cordierite phase (</span><em>β</em>-cordierite). The substitution of Mn²⁺<span><span> improved the sintering properties of cordierite and reduced the sintering temperature. When x = 0.2, the ceramics present the best comprehensive microwave </span>dielectric properties sintering at 1350 °C: </span><em>ε</em>_<em>r</em> ∼4.96, <em>Q × f</em> ∼72,000 GHz, <em>τ</em>_<em>f</em><span><span> ∼ −13 ppm/°C. The complex permittivity spectrum of the material was analyzed by far infrared spectroscopy<span>. The ion displacement polarization and low band peak have very high contribution to the complex permittivity. Thz-tds was used to analyze the </span></span>dielectric properties<span> and response mechanism of Mn-Cordierite ceramics at high frequency band, which have lower dielectric loss<span> at THz frequency band. P-V-L theory correlated the microwave dielectric properties of ceramics with the chemical bond properties. Si-O exhibits extremely high </span></span></span><em>U</em> and <em>E</em><span><span>, which makes a very high contribution to the dielectric<span> properties. A patch antenna and dielectric </span></span>resonator antenna (DRA) based on Mg</span>_1.6Mn_0.4Al₄Si₅O₁₈ were designed. The patch antenna exhibited a low reflection coefficient(S11) of −26.68 dB and a high gain of 7.11dBi at 4.55 GHz. Mn-cordierite-based DRA exhibited a HE_{11<em>δ</em>} mode at 8.1 GHz. The device had a low S11 value of −13.48 dB and a wide impedance bandwidth of 15.8 %, which meets the application in the field of civil communication.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 23","pages":"Pages 40171-40183"},"PeriodicalIF":5.6,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144922821","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of Ti content on microstructure evolution and properties of Ni50A-B4C coatings","authors":"Zhen-wei Li ,&nbsp;Tao Lin ,&nbsp;Liang Li ,&nbsp;Cai-nian Jing ,&nbsp;Ying-ming Tu ,&nbsp;Na-na Liu ,&nbsp;Xuan Yang","doi":"10.1016/j.ceramint.2025.06.245","DOIUrl":"10.1016/j.ceramint.2025.06.245","url":null,"abstract":"<div><div>Ni50A-B₄<span>C-Ti coatings with varying Ti contents (0–6 wt.%) were fabricated on H13 steel via laser cladding<span> technology, and the effects of Ti content on the phase composition, microstructure, properties of the coatings, and microstructure evolution were systematically investigated. Results indicate that the introduction of Ti promotes the formation of TiC and TiB</span></span>₂<span><span> phases and increases the lattice constant of the FeNi phase (from 0.17855 nm to 0.17975 nm), attributed to the </span>solid solution<span><span> strengthening effect caused by the larger atomic radius of Ti (132 p.m.). </span>Microstructural analysis reveals that the addition of 1 wt% Ti generates submicron TiC particles (0.17–0.2 μm) pinned within lamellar precipitates, significantly enhancing the hardness (659.83 HV</span></span>_0.5) and wear resistance (wear loss of 1 mg). However, when Ti content increases to 6 wt%, TiC/TiB₂<span> eutectic structures form through a preferential precipitation mechanism, while the exothermic nature of in situ reactions induces microstructural coarsening, leading to a hardness reduction (415.83 HV</span>_0.5<span>). Electrochemical tests demonstrate that the 6 wt% Ti coating exhibits optimal corrosion resistance, characterized by the lowest corrosion current density (I</span>_corr), which is attributed to the high compactness and self-healing capability of the TiO₂-Cr₂O₃<span> composite passive film. The study demonstrates that moderate Ti addition (1 wt%) optimizes mechanical performance, whereas higher Ti content (6 wt%) significantly improves corrosion resistance, providing a theoretical foundation for the composition design and performance regulation of laser-clad coatings.</span></div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 23","pages":"Pages 40108-40121"},"PeriodicalIF":5.6,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144922823","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Regulating the energy storage properties of BiFeO3-BaTiO3 ceramics by adding (Sr0.7Nd0.2)TiO3 at low electric fields","authors":"Meng Wang ,&nbsp;Ting Wang","doi":"10.1016/j.ceramint.2025.06.241","DOIUrl":"10.1016/j.ceramint.2025.06.241","url":null,"abstract":"<div><div>BiFeO₃-BaTiO₃<span><span><span> exhibits a high dielectric constant<span>, excellent ferroelectric properties, and </span></span>mechanical stability, making it a promising material for </span>energy storage applications. However, unmodified BiFeO</span>₃-BaTiO₃<span> ceramics typically exhibit high residual polarization and low breakdown strength<span>, resulting in low energy storage density and efficiency. In this study, (1-</span></span><em>x</em>)(0.67BiFeO₃-0.33BaTiO₃)-<em>x</em>(Sr_0.7Nd_0.2)TiO₃<span> ceramics were prepared and demonstrated a pseudo-cubic perovskite structure at room temperature. As the </span><em>x</em><span> value increased, the long-range ordered ferroelectric structure was disrupted, the relaxation characteristics were enhanced, and the grain size decreased significantly. The maximum polarization strength (P</span>_max) of the composition with <em>x</em> = 0.15 reached 38.57 μC/cm² at 180 kV/cm. Under low electric fields, this material achieved an excellent recoverable energy storage density (W_rec) of 2.57 J/cm³ and a high energy storage efficiency (η) of 79 %, while also exhibiting good frequency stability and charge/discharge performance. These characteristics suggest its potential application as a next-generation electrostatic capacitor material.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 23","pages":"Pages 40067-40078"},"PeriodicalIF":5.6,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144922810","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Eco-friendly synthesis, comprehensive characterization and photocatalytic efficiency of rare earth-substituted M-type hexaferrites for visible-light-driven dye degradation","authors":"Varsha C. Pujari ,&nbsp;Pramod D. Mhase ,&nbsp;Sagar D. Balgude ,&nbsp;Santosh S. Jadhav ,&nbsp;Sadaf J. Gilani ,&nbsp;Paresh S. More ,&nbsp;Sagar E. Shirsath ,&nbsp;Shoyebmohamad F. Shaikh ,&nbsp;Sunil M. Patange","doi":"10.1016/j.ceramint.2025.06.221","DOIUrl":"10.1016/j.ceramint.2025.06.221","url":null,"abstract":"<div><div>This study presents the structural tuning and multifunctional enhancement of Ba_0.5Ca_0.5Fe₁₂O₁₉<span> hexaferrite through neodymium (Nd</span>³⁺<span><span>) ion substitution (0.00 ≤ x ≤ 0.20), synthesized via an eco-friendly sol–gel auto-combustion route using lemon extract as fuel. X-ray diffraction analysis confirmed the formation of a single-phase M-type hexagonal structure with systematic shifts in lattice parameters and c/a ratio due to ionic substitution, correlating with observed variations in </span>crystallite<span><span> size and strain. These structural modifications directly impacted the electronic and dielectric properties<span>, as evidenced by a band gap reduction from 3.92 eV to 3.50 eV and a peak dielectric constant at x = 0.15. Microwave absorption measurements in the X-band (8–12 GHz) revealed a maximum reflection loss of −31.69 dB at 10.02 GHz for x = 0.10, indicating strong absorption behavior suitable for </span></span>electromagnetic shielding<span>. Moreover, the optimized composition (x = 0.15) exhibited 92 % degradation of Reactive Brown dye under solar irradiation within 20 min, highlighting its effectiveness as a visible-light photocatalyst. Notably, the photocatalyst displays stability and reusability over multiple cycles. These results demonstrate a strong structure–property–function correlation, positioning Nd</span></span></span>³⁺<span>-doped Ba-Ca hexaferrites as promising candidates for next-generation ceramic-based devices in environmental remediation and microwave attenuation technologies.</span></div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 23","pages":"Pages 39866-39885"},"PeriodicalIF":5.6,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144922929","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis and properties of high alumina cement-based porous composites in the ZrO2-CaO-Al2O3 system","authors":"Yesica L. Bruni ,&nbsp;María F. Hernández ,&nbsp;Susana Conconi ,&nbsp;Gustavo Suárez","doi":"10.1016/j.ceramint.2025.06.214","DOIUrl":"10.1016/j.ceramint.2025.06.214","url":null,"abstract":"<div><div>Previous research showed that ZrO₂–CaO–Al₂O₃<span> (Z-C-A) composites presented high chemical stability, making them suitable as refractory materials. This work obtained porous composites based on CA</span>₂–CZ and CA–CA₂–CZ phases using commercial high-alumina cement (HAC) and pure ZrO₂ powders with CaCO₃ and Al(OH)₃. The powder mixtures were dry-uniaxially pressed and sintered at 1300 and 1400 °C. The reaction was studied using thermal analysis techniques (TG-DTA). CaAl₄O₇ (CA₂), CaAl₂O₄ (CA), and CaZrO₃ (CZ) were the main phases formed in the ceramics, with c-ZrO₂ as a secondary phase. The sintering at 1400 °C promoted the in situ reactions, leading to the formation of the CA₂ and CZ phases and producing the reduction of the CA and c-ZrO₂ phase content. The high porosity determined in these composites (44–63 %) could be attributed to the thermal decomposition of gibbsite (Al(OH)₃<span>) during calcination. In the ceramics with a high content of the CA</span>₂ phase (66.7 and 76.7 wt% determined by Rietveld), the thermal expansion coefficient (CTE) reached a minimum value of ∼5.8 × 10⁻⁶ °C⁻¹, comparable to that of the mullite. The composite based on CA₂<span>-CZ phases (sintered at 1400 °C) presented the highest flexural strength (37 MPa), attributed to its lower porosity and more homogeneous microstructure.</span></div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 23","pages":"Pages 39794-39800"},"PeriodicalIF":5.6,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144921158","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The microwave absorption properties and mechanism of 40Sm0.5Sr0.5Co1-xMnxO3-60SrZrO3 composites","authors":"Tiehao Zhang ,&nbsp;Wenting He ,&nbsp;Yuyi Gao ,&nbsp;Qian Guo ,&nbsp;Yue Ma ,&nbsp;Hongbo Guo","doi":"10.1016/j.ceramint.2025.06.195","DOIUrl":"10.1016/j.ceramint.2025.06.195","url":null,"abstract":"<div><div><span>Development of microwave absorption<span> materials (MAMs) featuring thin thickness, wide bandwidth, and superior thermal stability remains a critical challenge for practical engineering applications<span>. This paper systematically investigated the dielectric and microwave absorption characteristics of 40 wt%Sm</span></span></span>_0.5Sr_0.5C_O1-xMn_xO₃-60 wt%SrZrO₃ composites. Remarkably, the Sm_0.5Sr_0.5C_O0.5Mn_0.5O₃-SrZrO₃<span><span> composite presents the widest bandwidth of 5.1 GHz with reflection loss &lt; −5 dB at a thickness of only 1.4 mm, attributed to the optimal input impedance and a superior attenuation factor. Through comprehensive analysis of </span>electromagnetic dissipation mechanisms, it revealed that the Mn</span>⁴⁺ substitution of Co³⁺<span><span><span> leads to a reduction in conduction loss and an enhancement of both dipole polarization and </span>interfacial polarization, while the eddy-current loss and </span>magnetic resonances have contribution as well. These findings establish the Sm</span>_0.5Sr_0.5Co_1-xMn_xO₃-SrZrO₃ (x = 0.5) composite as a promising candidate for microwave absorption applications, offering an optimal combination of thin-profile design and broadband performance.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 23","pages":"Pages 39597-39610"},"PeriodicalIF":5.6,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144922150","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}